203421020203 has 16 divisors (see below), whose sum is σ = 208813857280. Its totient is φ = 198102477600.

The previous prime is 203421020123. The next prime is 203421020251. The reversal of 203421020203 is 302020124302.

It is not a de Polignac number, because 203421020203 - 2¹⁷ = 203420889131 is a prime.

It is a super-2 number, since 2×203421020203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203421020293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3079108 + ... + 3144478.

It is an arithmetic number, because the mean of its divisors is an integer number (13050866080).

Almost surely, 2^203421020203 is an apocalyptic number.

203421020203 is a deficient number, since it is larger than the sum of its proper divisors (5392837077).

203421020203 is a wasteful number, since it uses less digits than its factorization.

203421020203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65938.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 203421020203 its reverse (302020124302), we get a palindrome (505441144505).

The spelling of 203421020203 in words is "two hundred three billion, four hundred twenty-one million, twenty thousand, two hundred three".